diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2021-04-06 16:48:12 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-04-09 13:54:00 +0300 |
| commit | 2c9541720c66899adf6f3600984cf3ef151295ad (patch) | |
| tree | 0fe1bbc08b090e4fe72d6701cfad84586e94849b /drivers/media | |
| parent | fa56f5f1fe31c2050675fa63b84963ebd504a5b3 (diff) | |
| download | linux-2c9541720c66899adf6f3600984cf3ef151295ad.tar.xz | |
media: i2c: adv7511-v4l2: fix possible use-after-free in adv7511_remove()
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.
Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/adv7511-v4l2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/i2c/adv7511-v4l2.c b/drivers/media/i2c/adv7511-v4l2.c index 992db5c79b13..5fc6c06edda1 100644 --- a/drivers/media/i2c/adv7511-v4l2.c +++ b/drivers/media/i2c/adv7511-v4l2.c @@ -1958,7 +1958,7 @@ static int adv7511_remove(struct i2c_client *client) adv7511_set_isr(sd, false); adv7511_init_setup(sd); - cancel_delayed_work(&state->edid_handler); + cancel_delayed_work_sync(&state->edid_handler); i2c_unregister_device(state->i2c_edid); i2c_unregister_device(state->i2c_cec); i2c_unregister_device(state->i2c_pktmem); |